no. 3
Approximation of the solutions of some variational inequalities
Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche, Série 3, Tome 21 (1967) no. 3, pp. 373-394
corrigé par Erratum : “Approximation of the solution of some variational inequalities” 
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     author = {Mosco, Umberto},
     title = {Approximation of the solutions of some variational inequalities},
     journal = {Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche},
     pages = {373--394},
     year = {1967},
     publisher = {Scuola normale superiore},
     volume = {Ser. 3, 21},
     number = {3},
     mrnumber = {226376},
     zbl = {0184.36803},
     language = {en},
     url = {https://www.numdam.org/item/ASNSP_1967_3_21_3_373_0/}
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Mosco, Umberto. Approximation of the solutions of some variational inequalities. Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche, Série 3, Tome 21 (1967) no. 3, pp. 373-394. https://www.numdam.org/item/ASNSP_1967_3_21_3_373_0/

(1) See [1] G. Stampacchia, Formes bilinéaires coercitives sur les ensembles convexes, C. R. Acad. Sc. Paris, t. 258 (1964), p. 4413-4416; | Zbl | MR

[2] J.L. Lions and G. Stampacchia, Ircequations variationneZLes non coercives C. R. Acad. Sc. Paris, t. 261 (1965), p. 25-27; | Zbl | MR

[3] J.L. Lions and G. Stampacchia, Variational Inequalities, to appear. For the « elliptic regularization » see also J.L. Lions, Some aspects of operator differential equations, Lectures at C.I.M.E., Varenna, May 1963. | MR

(2) See for instance G.T. Whyburn, Analytic Topology, Amer. Math. Soc. Colloq. Publs., Vol. 26, 1942, p. 10 or C. Berge, Espaces topologiques, 1959, Dunod, Paris p. 124.

(3) A similar argument has been used by P. Hartmann and G. Stampacchia to prove the existence of the solution of a non linear variational inequality, see P. H. - G. S., On some non-lineai- elliptic differential functional equations, Acta Mat. Vol. 115,1966,

(4) W. Littman, G. Stampacchia, H.F. Weinberger Regular Points for elliptic equations with discontinuous coefficients, Ann. Sc. Norm. Sup. Pisa XVII (1963), p. 45-79. | Zbl | MR | Numdam